I did alot of research online before purchasing this pump. You can not return breast pumps once you have opened them to ANY store. This pump works great and is so easy to use. You can choose to pump both sides at once or only one. If you only want to pump one side you just take one of the hose off and close the valve. This pump comes in purple and comes with two bottles. You get everything you need to start. It is so simple to set up. There are two dials to adjust the suction and speed. This pump is FDA approved. There is no way for the milk to come up into the tubes or machine since there is an...